This script relaxes the selected vertices while retaining the shape as much as possible.
Open Blender and go to Preferences then the Add-ons tab.
Click Mesh then Relax to enable the script.
Go into Edit Mode and select the vertices you want to relax. To execute the script eitheror use instead.
Relax the selected vertices while retaining the shape.
This add-on is bundled with Blender.